
L
CodePart Name Part NumberCodePart Name Part Number
2005 HIGHLANDER (EWD592U)
343
E 4Electronically Controlled Transmission
Pattern Select SW90980-10797
E 5Engine Control Module90980-12142
E 6Engine Control Module90980-12146
E 7Engine Control Module90980-12144
E 8Engine Control Module90980-12145
E 9Engine Control Module90980-12143
E10Electronically Controlled Transmission
Solenoid90980-1 1658
E12Evaporator Temp. Sensor90980-1 1918
F 1Front Fog Light LH90980-1 1660F 2Front Fog Light RH90980-1 1660
F3Front Parking Light LHF 3Front Turn Signal Light LH90980-1 1020
F4Front Parking Light RH90980-1 1020
F 4Front Turn Signal Light RH
F 5Front Wiper Deicer90980-1 1407
F 6Front Wiper Motor90980-1 1599
F 7Fusible Link Block-
F 8Front Power Outlet90980-10760
F10Front Door Speaker LH90980-10935F11Front Door Speaker RH90980-10935
F12Fuel Pump90980-1 1077F12Fuel Sender90980-11077
F14Front Washer Motor90980-1 1019
G 1Generator90980-1 1964
G 2Generator90980-09365
G 4Glove Box Light90980-1 1098
G 5Gateway ECU90980-1 1911
H 1Headlight LH (High Beam)90980-1 1659
H 2Headlight LH (Low Beam)90980-1 1660
H 3Headlight RH (High Beam)90980-1 1659
H 4Headlight RH (Low Beam)90980-1 1660
H 6Heated Oxygen Sensor (Bank 2 Sensor 2)90980-1 1930
H 7Horn LH90980-10619H 8Horn RH90980-10619
H 9Heater Relay82660-44010
H10Heated Oxygen Sensor (Bank 1 Sensor 2)90980-1 1929
H11High Mounted Stop Light90980-1 1148
I 2Ignition Coil and Igniter No.1
I 3Ignition Coil and Igniter No.2
I 4Ignition Coil and Igniter No.390980-1 1885I 5Ignition Coil and Igniter No.490980-1 1885
I 6Ignition Coil and Igniter No.5
I 7Ignition Coil and Igniter No.6
I8Injector No.1 (2AZ-FE)90980-1 1875I 8Injector No.1 (3MZ-FE)90980-1 1153
I9Injector No.2 (2AZ-FE)90980-1 1875I 9Injector No.2 (3MZ-FE)90980-1 1153
I10Injector No.3 (2AZ-FE)90980-1 1875I10Injector No.3 (3MZ-FE)90980-1 1153
I11Injector No.4 (2AZ-FE)90980-1 1875I11Injector No.4 (3MZ-FE)90980-1 1153
I12Injector No.590980-1 1153I13Injector No.690980-11153
I14Ignition Key Cylinder Illumination90980-1 1148
I15Ignition SW90980-1 1615
I16Interior Light90980-10908
I17Inner Mirror90980-1 1794
J 1Junction Connector
J 2Junction Connector90980-1 1194J 3Junction Connector90980-1 1194
J 4Junction Connector
J 5Junction Connector90980-1 1542
J 6Junction Connector90980-1 1915
J 7Junction Connector90980-1 1542
J10Junction Connector90980-10807J12Junction Connector90980-10807
J13Junction Connector90980-1 1915
J14Junction Connector90980-10976
J16Junction Connector90980-1 1915J17Junction Connector90980-1 1915
J18Junction Connector
J19Junction Connector90980-1 1542
J20Junction Connector
J21Junction Connector
J22Junction Connector90980-12374J23Junction Connector90980-12374
J24Junction Connector
K 1Knock Sensor (Bank 1)
K 2Knock Sensor (Bank 1)90980-1 1875
K 3Knock Sensor (Bank 2)
K4Key Interlock Solenoid90980-10795K 4Unlock Warning SW90980-10795
L 1License Plate light90980-1 1300
M 1Mass Air Flow Meter90980-1 1317
M 2Main SW90980-10957
M 3Multi-Display90980-12203
M 4Multi-Display90980-12410
M 5Multi-Display90980-12012
N 1Noise Filter (Ignition System)90980-10843
N 2Noise Filter (Rear Window Defogger)90980-10860
N 3Navigation ECU90980-1 1973

2005 HIGHLANDER (EWD592U)
324
J POWER SOURCE (Current Flow Chart)
Engine Room R/B (See Page 22)
FuseSystemPage
7.5ACRTAudio System (8 Speaker)
Navigation System272
266
7.5ASTARTER
Engine Control (2AZ-FE)
Engine Control (3MZ-FE)
Starting and Ignition88
74
66
10AEFI NO.2Engine Control (2AZ-FE)
Engine Control (3MZ-FE)88
74
10AETCS
Engine Control (2AZ-FE)
Engine Control (3MZ-FE)
Cruise Control (2AZ-FE)
Cruise Control (3MZ-FE)88
74
172
164
15AH-LP LH LWRHeadlight (w/ Daytime Running Light)
Headlight (w/o Daytime Running Light)11 8
122
15AH-LP RH LWR
Combination Meter
Headlight (w/ Daytime Running Light)
Headlight (w/o Daytime Running Light)282
11 8
122
15ARR HTRRear Heater312
25AA/FEngine Control (3MZ-FE)74
Engine Room Room R/B No.3 (See Page 23)
FuseSystemPage
7.5ADRLHeadlight (w/ Daytime Running Light)11 8
Fusible Link Block (F 7 on See Page 25)
FuseSystemPage
30AABS1VSC and Tire Pressure Warning System180
30AAM2Starting and Ignition66
30ACDSRadiator Fan and Condenser Fan (2AZ-FE)
Radiator Fan and Condenser Fan (3MZ-FE)294
290
30ARDIRadiator Fan and Condenser Fan (2AZ-FE)
Radiator Fan and Condenser Fan (3MZ-FE)294
290
30ARR DEFRear Window Defogger252
50AABS2VSC and Tire Pressure Warning System180
50AHTRAir Conditioning (Automatic A/C)
Air Conditioning (Manual A/C)298
304
140AALT
Automatic Light Control
Charging
Illumination
Light Auto Turn Off System
Power Outlet
Power Seat (Driver's Seat)
Radiator Fan and Condenser Fan (2AZ-FE)146
70
142
148
246
234
294
*These are the page numbers of the first page on which the related system is shown.

2005 HIGHLANDER (EWD592U)
325
J
FuseSystemPage
140AALT
Radiator Fan and Condenser Fan (3MZ-FE)
Starting and Ignition
Taillight
Theft Deterrent System290
66
128
208
Engine Room J/B (See Page 26)
FuseSystemPage
7.5AALT-SCharging70
7.5AECU-B
Air Conditioning (Automatic A/C)
Air Conditioning (Manual A/C)
Automatic Light Control
Charging
Combination Meter
Cruise Control (2AZ-FE)
Cruise Control (3MZ-FE)
Door Lock Control
Electronically Controlled Transmission and A/T Indicator (2AZ-FE)
Electronically Controlled Transmission and A/T Indicator (3MZ-FE)
Engine Control (2AZ-FE)
Engine Control (3MZ-FE)
Engine Immobilizer System
Front Fog Light
Headlight (w/ Daytime Running Light)
Headlight (w/o Daytime Running Light)
Interior Light
Key Reminder and Seat Belt Warning
Light Auto Turn Off System
Moon Roof
Navigation System
Power Window
SRS
Theft Deterrent System
VSC and Tire Pressure Warning System
Wireless Door Lock Control298
304
146
70
282
172
164
194
11 0
102
88
74
100
126
11 8
122
136
226
148
216
266
188
155
208
180
200
10ADOME
Combination Meter
Cruise Control (2AZ-FE)
Cruise Control (3MZ-FE)
Electronically Controlled Transmission and A/T Indicator (2AZ-FE)
Electronically Controlled Transmission and A/T Indicator (3MZ-FE)
Engine Control (2AZ-FE)
Engine Control (3MZ-FE)
Garage Door Opener
Illumination
Interior Light282
172
164
11 0
102
88
74
250
142
136
*These are the page numbers of the first page on which the related system is shown.

2005 HIGHLANDER (EWD592U)
326
J POWER SOURCE (Current Flow Chart)
FuseSystemPage
10ADOME
Key Reminder and Seat Belt Warning
Navigation System
Theft Deterrent System
VSC and Tire Pressure Warning System
Wireless Door Lock Control226
266
208
180
200
10AH-LP LH UPRHeadlight (w/ Daytime Running Light)
Headlight (w/o Daytime Running Light)11 8
122
10AH-LP RH UPRHeadlight (w/ Daytime Running Light)
Headlight (w/o Daytime Running Light)11 8
122
10AHORNHorn
Theft Deterrent System242
208
15AHAZARDTrailer Towing
Turn Signal and Hazard Warning Light152
130
15ASECURITYTheft Deterrent System208
20AEFI NO.1
Cruise Control (2AZ-FE)
Cruise Control (3MZ-FE)
Electronically Controlled Transmission and A/T Indicator (2AZ-FE)
Electronically Controlled Transmission and A/T Indicator (3MZ-FE)
Engine Control (2AZ-FE)
Engine Control (3MZ-FE)172
164
11 0
102
88
74
20APOWER OUTLET2Power Outlet246
20ATOWINGTrailer Towing152
25ADOOR LOCK
Door Lock Control
Theft Deterrent System
Wireless Door Lock Control194
208
200
25ARAD NO.1Audio System (6 Speaker)
Audio System (8 Speaker)280
272
40AMAIN
Automatic Light Control
Headlight (w/ Daytime Running Light)
Headlight (w/o Daytime Running Light)
Light Auto Turn Off System
Theft Deterrent System146
11 8
122
148
208
instrument Panel J/B (See Page 28)
FuseSystemPage
7.5AIG1
Automatic Glare-Resistant EC Mirror
Automatic Light Control
Back-Up Light
Cruise Control (2AZ-FE)
Cruise Control (3MZ-FE)
Door Lock Control
Electronically Controlled Transmission and A/T Indicator (2AZ-FE)
Electronically Controlled Transmission and A/T Indicator (3MZ-FE)
Front Fog Light264
146
134
172
164
194
11 0
102
126
*These are the page numbers of the first page on which the related system is shown.

2005 HIGHLANDER (EWD592U)
327
J
FuseSystemPage
7.5AIG1
Headlight (w/ Daytime Running Light)
Headlight (w/o Daytime Running Light)
Interior Light
Key Reminder and Seat Belt Warning
Light Auto Turn Off System
Mirror Heater and Front Deicer
Moon Roof
Navigation System
Power Outlet
Power Window
Seat Heater
SRS
Theft Deterrent System
Trailer Towing
Turn Signal and Hazard Warning Light
Wireless Door Lock Control11 8
122
136
226
148
254
216
266
246
188
256
155
208
152
130
200
7.5AOBDEngine Control (2AZ-FE)
Engine Control (3MZ-FE)88
74
7.5APANELIllumination142
7.5ARAD NO.2
Air Conditioning (Automatic A/C)
Air Conditioning (Manual A/C)
Audio System (6 Speaker)
Audio System (8 Speaker)
Automatic Light Control
Door Lock Control
Headlight (w/ Daytime Running Light)
Headlight (w/o Daytime Running Light)
Interior Light
Key Reminder and Seat Belt Warning
Navigation System
Power Window
Remote Control Mirror
Shift Lock
Theft Deterrent System
Wireless Door Lock Control298
304
280
272
146
194
11 8
122
136
226
266
188
240
232
208
200
10AECU-IG
Charging
Navigation System
Shift Lock
Theft Deterrent System
VSC and Tire Pressure Warning System70
266
232
208
180
10AHEATER
Air Conditioning (Automatic A/C)
Air Conditioning (Manual A/C)
Charging
Combination Meter298
304
70
282
*These are the page numbers of the first page on which the related system is shown.

2005 HIGHLANDER (EWD592U)
328
J POWER SOURCE (Current Flow Chart)
FuseSystemPage
10AHEATER
Cruise Control (2AZ-FE)
Cruise Control (3MZ-FE)
Electronically Controlled Transmission and A/T Indicator (2AZ-FE)
Electronically Controlled Transmission and A/T Indicator (3MZ-FE)
Engine Control (2AZ-FE)
Engine Control (3MZ-FE)
Interior Light
Key Reminder and Seat Belt Warning
Mirror Heater and Front Deicer
Navigation System
Radiator Fan and Condenser Fan (2AZ-FE)
Radiator Fan and Condenser Fan (3MZ-FE)
Rear Heater
Rear Window Defogger
SRS
VSC and Tire Pressure Warning System172
164
11 0
102
88
74
136
226
254
266
294
290
312
252
155
180
10AIGN
Combination Meter
Cruise Control (2AZ-FE)
Cruise Control (3MZ-FE)
Electronically Controlled Transmission and A/T Indicator (2AZ-FE)
Electronically Controlled Transmission and A/T Indicator (3MZ-FE)
Engine Control (2AZ-FE)
Engine Control (3MZ-FE)
Engine Immobilizer System
SRS
VSC and Tire Pressure Warning System282
172
164
11 0
102
88
74
100
155
180
10ATAIL
Front Fog Light
Taillight
Trailer Towing126
128
152
15ACIGCigarette Lighter244
15AIG2
Engine Control (2AZ-FE)
Engine Control (3MZ-FE)
Starting and Ignition88
74
66
15APWR OUTLET1Power Outlet246
15ARR WIPRear Wiper and Washer224
15ASEAT HTRSeat Heater256
20AD RR DOORPower Window188
20AFR DEFMirror Heater and Front Deicer254
20AFR FOGFront Fog Light126
20AP FR DOOR
Door Lock Control
Interior Light
Power Window194
136
188
*These are the page numbers of the first page on which the related system is shown.

05IU9-01
Turn igniton switch ON with AUTO
and R/F switches held down.
Indicator Check
DTC Check
(Sensor Check)
(continuous operation)
DTC Check
(Sensor Check)
(stepped operation)OFF
OFF
DEF
DEF
Actuator Check
(continuous operaiton)
DEFOFF
Actuator Check
(stepped operation)OFF
DEF
If both AUTO switch and R/F switches are
not pressed at the same time.
R/F
R/FR/F
AUTO
: Indicates a switch operation
AUTOAUTO
R/F: Recirculation/Fresh
Cancel check mode and start A/C control.
I30328
w/o Navigation System
I38758
w/ Navigation System
- DIAGNOSTICSAIR CONDITIONING SYSTEM
05-1 117
1307 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
PRE-CHECK
1. LIST OF OPERATION METHODS
By operating each of the A/C control switches as shown in the diagram below, it is possible to enter the diag-
nosis check mode.
2. INDICATOR CHECK
(a) Turn the ignition switch ON while pressing the A/C control
AUTO switch and R/F switch simultaneously.

I41003
w/o Navigation System
I38757
w/ Navigation System
I36113
1 Sec.
1 Sec.
ON
OFF
I30327
DTC w/o Navigation System
I38759
w/ Navigation SystemDTC 05-1 118
- DIAGNOSTICSAIR CONDITIONING SYSTEM
1308 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
(b) Check that the indicators light up and go off at 1 second
intervals 4 times in succession.
HINT:
After the indicator check is completed, the system enters
the DTC automatically.
Press the OFF switch when desiring to cancel the check
mode.
3. DTC CHECK (SENSOR CHECK)
(a) Perform an indicator check. After the indicator check is
completed, the system enters the DTC check mode auto-
matically.
(b) Read the code displayed on the panel. Refer to the list of
codes on page 05- 1125 when reading the codes.
(Trouble codes are output at the temperature display.)